... After asking you to make a more close-up photo of your stators I realized that it might be quicker and easier if I briefly illustrated what I would suggest - and then you probably already know if you've made the stators like this (and if it's interesting to you/possible to make).

So I've attached a very simple illustration of what would be my suggestion: To round the edges of the holes in the stator in an arc-like form (on the illustration they are cut-outs of an ellipsoid) so as to reduce potential turbulence or uneven flow/transmission through the holes when the sound plays.

From the photos you've taken I can't see if the holes are already rounded ...

Personally, I believe this would be quite audible, although I haven't tried it yet. But as you might have noticed from the other thread on ESHP (ES HeadPhones) I started I will be using round wires for the stators I'm making.

If you can, you should really try to work with a CNC machine. There are just unlimited things you can make using it.

As for my newest pair of headphones, you might notice that they're a lot larger size than any of my previous ones. There're no earpads to cover your ears. They are very light and comfortable to wear. I really like them.

The sound stage is huge. However, the bass doesn't go as low as the ones with sealed earpads. But it's not that bad at all. Many of my friends who have tried them actually prefered them to my other headphones.